Home / 28,240.41-38,971.78-15,665.16

Finding the Fourth Proportional to 28,240.41, 38,971.78 and 15,665.16

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Solution

The fourth proportional to 28,240.41, 38,971.78 and 15,665.16 is: 21,617.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    28,240.41 : 38,971.78 = 15,665.16 : x
  2. Step 2: Convert to fraction form
    28,240.41/38,971.78 = 15,665.16/x
  3. Step 3: Cross multiply
    28,240.41x = 38,971.78 × 15,665.16
  4. Step 4: Simplify right side
    28,240.41x = 610,499,110.92
  5. Step 5: Solve for x
    x = 610,499,110.92/28,240.41
  6. Step 6: Final answer
    x = 21,617.93

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.